Question 2009 accel noise

[Inurdream]

Hi All,
My 09 vert with 82k has started making a whining/ hollow whistle kind if noise under heavy acceleration around 3k rpm and higher. Weather its in automatic or shiftronic it will do it.
I recently change my exhaust to a Magnaflow cat back but 98% sure thats not the issue.
it sounds like a whistle type noise in a tube. I suspect it may be the trans but wanted to see if anyone has heard this.
Any help experience on this would be greatful.
TIA

 

[Rruuff Day]

Without hearing it, could be an air noise... intake, exhaust leak or vacuum line maybe?

 

[Inurdream]

Without hearing it, could be an air noise... intake, exhaust leak or vacuum line maybe?

Makes sense… im a auto tech by trade and i can say at 100 % its definitely not anything in the engine area. Il try to post the sound. I wanted to ask in case someone encountered the noise. To me it sounds like a hollow whistle/ winning noise sounding like drive shaft in a tube noise when i accel from a stop at higher rpm or speeds. If driving normally I don’t hear it. I have a transmission tech friend and will go see him as I’ve never really hear anything like this.